Office chair



FIG. 1 is a perspective view of office chair showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines shown on the central portion of the backrest and the seat are understood to represent stitching. 

The ornamental design for office chair, as shown and described. 